Machine model: think about sl410k
== sync, corrected by elderman == @elder man
Problem: power up to 0. 18
[analysis of the problem]: the machine that reached out of power, as you all know, was basically out of power, caused by the hwpg。
Header
[maintenance process]: 1. 5 v memory power deficit measured and vtt power deficit detected
One, condition check. We've got power
2. The same is true for the three chips that have been replaced in a row。
3. The wave shape of the upper and lower g poles, measured by oscilloscopes, is a flash of the 5v wave shape, which is likely to have a problem with self-inflicted pressure, measuring the no-breathing circuits, short circuits, the replacement of the lifting cap and the boosting of electrical resistance, or not, and the replacement of the upper and lower mos tube, which is not possible。
4. Each of the triggers of the chip is valued, and the electrical resistance connected to it is not broken, nor is the small filter capacity that is replaced by 2 foot vtt voltage。
I'm a little skeptical when i'm here. I'm going to have to take a look at the other voltage, check it over and back and fix the memory。
This problem is occasionally encountered, and the conditions are met, and the chip's perimeter is free of electricity, with a close look at the edge of the chip, and a large insurance barrier, which connects the top officer d to a public point, is broken, and only 90 can be measured, the filtering capacity of the d pole is burned, insurance is changed, two filtering caps are replaced and the machine is repaired。
Burning electrical resistance
Flash chart
Summary
It's easy to fix it, but the filter's capacitor is broken, and the insurance burns. But what if you didn't fix it, and the chip was met, and there was no short circuit, and the break, it sounded like a headache。
Xiao eun
